It is important to ensure the tiles or mosaic sheet is clean and tape-removed before grout wiping. Expand grout from bottom to top diagonally by using a small trowel. After wiping the first layer, then we mop or roll the grout in the opposite direction. All grouting work process before apply new grout ensure the remove excess grout from between gaps of the tiles or mosaic chips with a knife and clean up all the debris and dirt.